Quote:
Originally Posted by
Richard Rombold
I have had limited exposure to pox on koi but have seen numerous cases of pox on mature Goldfish and this in my opinion is not pox. The locations of the two growths are not random viral outbreaks, but predictable areas for disease. Problems with the opercular plates generally result from a fish's response to irritation. Damage to the tip of the dorsal fin is also a common problem area. Excessively high or low pH, handling or disease can cause erosion of the epithelial layer here. Another significant observation is the grayish film developing on the body. Taken together we can make an educated guess. First, not pox. Second, not saprolegina. Good try, but not our guy. This growth is not tissue. I thought keloid tissue, but it doesn't add up. It's not bacterial. It's colonial. It's on the skin. I'd venture epistylis.
Rich
I thought Epistylus presents as a cottony mass. These lesions are more firm and gelatinous to the touch (based on Marie's explanation). The particular type of lesion or growth is A-typical of lymphocystis. Some folks call it carp pox because they don't know it by any other name. Although they are two different viruses, they both do present nearly identical symptoms. Also, I've seen fish who present with a milky coating on the body, especially when temps drop rather quickly. Even seen it on my own fish occasionally. It seems to go away after the water temp has stabilized (at whatever temp) and the fish get accustomed to it. Seems like it might be a type of Ich or just an extra layer of slime the fish produces due to the sudden temp change.
Mike
You are on the right track to raise the water temperature and salt the QT tank. Take the water temp up to 80 F and bring the salt up to .6%. Treat with either a MG or acriflavin bath.
This could work fine if what you diagnose is the real problem. However, if it's actually pox or lymphocystis the regimen will probably not have any effect whatsoever. Maybe just raising the salt FIRST would be a way to test the theory for the slime coat!?
The bigger question is why are you having this problem? Protozoan outbreaks are a common result of poor pond hygiene. Is your system accumulating an excessive amount of organic material?